How to use logging with python's fileConfig and configure the logfile filename

Question

I have a logging configuration file for logging to console and a file with different formats and levels. In my python script I can load this configuration and basically console and file output are ok.

I set the file name in the config file as shown below.

Is it possible to set that file name in the python script itself?

python code:

# set up logging logging.config.fileConfig(loginipath) logger = logging.getLogger('sLogger') # log something logger.debug('debug message') logger.info('info message') logger.warn('warn message') logger.error('error message') logger.critical('critical message')

logging config file:

[loggers] keys=root,sLogger [handlers] keys=consoleHandler,fileHandler [formatters] keys=fileFormatter,consoleFormatter [logger_root] level=DEBUG handlers=consoleHandler [logger_sLogger] level=DEBUG handlers=consoleHandler,fileHandler qualname=sLogger propagate=0 [handler_consoleHandler] class=StreamHandler level=WARNING formatter=consoleFormatter args=(sys.stdout,) [handler_fileHandler] class=FileHandler level=DEBUG formatter=fileFormatter args=('logfile.log',) [formatter_fileFormatter] format=%(asctime)s - %(name)s - %(levelname)s - %(message)s datefmt= [formatter_consoleFormatter] format=%(levelname)s - %(message)s datefmt=

YDF · Accepted Answer · 2021-05-13 01:51:10Z

76

Change your handler_fileHandler section like so:

[handler_fileHandler] class=FileHandler level=DEBUG formatter=fileFormatter args=('%(logfilename)s',)

and then add a defaults argument to the fileConfig call

logging.config.fileConfig(loginipath, defaults={'logfilename': '/var/log/mylog.log'})

edited May 13, 2021 at 1:51

YDF

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answered Nov 27, 2013 at 13:11

Navin

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2 Comments

frei Over a year ago

I know this is old, but is it possible to specify the filename in the config file name and path rather than in the script that is calling it?

LetsOMG Over a year ago

stackoverflow.com/questions/9484232/…

MG2 · Accepted Answer · 2018-03-31 16:04:41Z

Both handlers worked for me:

(1)

logging.config.fileConfig( 'logging.ini' , disable_existing_loggers=False) [handler_myhandler1] class=FileHandler level=DEBUG formatter=form01 args=('python.log', 'w')

(2)

logging.config.fileConfig( 'logging.ini' , disable_existing_loggers=False, defaults={ 'logfilename' : getSomeName() } ) [handler_myhandler2] class=FileHandler level=DEBUG formatter=form01 args=('%(logfilename)s','w')

after reading examples at https://docs.python.org/2/library/logging.config.html

cefect · Accepted Answer · 2022-08-30 07:42:54Z

For those of you wanting to only specify the directory, not the filename, keep in mind you can use python expressions in the config file. So the config file should look something like:

[handler_myhandler2] class=FileHandler level=DEBUG formatter=form01 args=(os.path.join('%(logdirpath)s', 'yourfilename.log'),'w')

and your caller should look like:

logging.config.fileConfig(loginipath, defaults={'logdirpath': '/var/log'})

be mindfulf that the ConfigParser expects single forward slashes for filepaths.

John Zwinck · Accepted Answer · 2013-03-02 12:30:21Z

0

Try calling logging.config.dictConfig() after fileConfig() and just setting the filename.

answered Mar 2, 2013 at 12:30

John Zwinck

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1 Comment

red_tiger Over a year ago

Could you give an example of how to set the file name. Thanks.

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